We have two Dobermans (sisters) who play together all day, and this toy is our salvation! We have gone through -- and wasted so much money on -- supposedly "durable" dog toys that barely make it through a few hours with our "girls." We have had 2 Bumi's for about a year, and they chew on them, play tug of war for hours with them, fall asleep with them, drag them around... and the toys have not only survived, they barely have teeth marks in them! If you've got big, energetic dogs, this is the toy to get!!